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WO2019038124A1 - Cloueuse pneumatique à ensemble soupape de sécurité - Google Patents

Cloueuse pneumatique à ensemble soupape de sécurité Download PDF

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Publication number
WO2019038124A1
WO2019038124A1 PCT/EP2018/071970 EP2018071970W WO2019038124A1 WO 2019038124 A1 WO2019038124 A1 WO 2019038124A1 EP 2018071970 W EP2018071970 W EP 2018071970W WO 2019038124 A1 WO2019038124 A1 WO 2019038124A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
trigger
control
chamber
storage chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2018/071970
Other languages
German (de)
English (en)
Inventor
Joachim Bauer
Martin THEBERATH
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Joh Friedrich Behrens AG
Original Assignee
Joh Friedrich Behrens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Joh Friedrich Behrens AG filed Critical Joh Friedrich Behrens AG
Priority to BR112020002035-4A priority Critical patent/BR112020002035A2/pt
Priority to US16/640,632 priority patent/US11628549B2/en
Priority to JP2020508045A priority patent/JP7049049B2/ja
Priority to AU2018319253A priority patent/AU2018319253B2/en
Priority to RU2020110228A priority patent/RU2781550C2/ru
Priority to CN201880053950.7A priority patent/CN111372730B/zh
Publication of WO2019038124A1 publication Critical patent/WO2019038124A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/041—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with fixed main cylinder
    • B25C1/043—Trigger valve and trigger mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/008—Safety devices

Definitions

  • the invention relates to a Druck Kunststoffnagler having a trigger, a Aufsetztler and a control valve assembly. If the compressed air bearing is attached to a workpiece, the touch sensor is displaced against the force of a spring until a muzzle s tool on the workpiece or almost rests. Only with such actuated Aufsetzrler a driving operation can be triggered. As a result, the pneumatic nailers offer considerably improved safety against unintentional releases compared to devices without touch sensors.
  • Some pneumatic nailers of the type described can be used in two different modes: In the so-called one-time release, the pneumatic nailer is first attached to a workpiece and thus actuates the landing sensor. Subsequently, the trigger is actuated by hand, thereby triggering a single drive. In the so-called contact triggering, also referred to as "touching”, the user already holds the release button while attaching the pneumatic nailer to the workpiece When the workpiece is applied to the workpiece, the placement sensor is actuated, thereby triggering a drive-in action be applied quickly sequence, which allows a very fast working, especially if many fasteners must be driven for a sufficient attachment to the positioning accuracy only small requirements are gestimmed.
  • the contact triggering procedure entails an increased risk of injury.
  • the user depress the hand-operated trigger when he wants to place the pneumatic nailer on one and the same workpiece a few centimeters from the last driven fastener, but also when changing to another remotely located workpiece in the event of unintentional contact of an object or body part with the attachment sensor, a drive-in procedure to be triggered.
  • accidents can occur if a user (in violation of important safety regulations) uses the pneumatic nailer to climb onto a ladder, holding down the trigger and inadvertently brushing his leg with the jack sensor.
  • a similar functionality is provided by the pneumatic nailer disclosed in US Pat. No. 3,964,659, which can likewise be used in a single and in a contact release mode and in which a trigger and an attachment sensor are mechanically coupled via a rocker.
  • the rocker acts on a control valve to initiate a drive-in operation by venting a main control line. If only the trigger and not the touch sensor is actuated, a control pin of the control valve is moved only over part of its displacement. This half actuation of the control valve results in slow ventilation of a control valve. chamber via a small ventilation opening.
  • the pressure prevailing in the control chamber acts on a valve sleeve, which surrounds the control valve, and finally displaces this Ventiihülse in a locked position in which a complete actuation of the valve pin, the main control line can no longer vent, so that a contact triggering is not possible.
  • a further improvement in safety can be achieved if a first driving operation must always be carried out by a single trip.
  • the device must first be attached to the workpiece for the first driving operation, whereby the Aufsetzman is actuated.
  • a subsequent actuation of the trigger then triggers the first drive.
  • further driving operations can be carried out by Kunststoffausiösung within a short period of time, ie by repeated lifting and attaching the device to the workpiece with continuously actuated trigger.
  • This functionality is given in the compressed air nailer described in the document DE 10 2013 106 657 AI.
  • a trigger and a touch sensor are mechanically coupled via a rocker, which acts on a control valve to trigger a driving operation.
  • a pressure is built up in a control chamber which acts on a mechanical actuator.
  • the control chamber is vented slowly via a vent.
  • the actuator comes into a blocking position, whereby a mechanical action of the touchdown sensor prevents the rocker when the trigger is actuated and a Wegausiösung is impossible.
  • a trigger and a touch sensor the joint operation of which can ventilate or bleed a main control line and thereby trigger a drive-in operation
  • control valve assembly comprising a trigger valve associated with the trigger and a landing sensor valve associated with the landing sensor, and
  • a safety valve assembly which is displaceable by controlling the pressure in a first control chamber and the pressure in a second control chamber, between a Sperrsteliung and an open position, wherein
  • Trigger valve is connected, that an actuation of the trigger valve seeks to bring the safety valve assembly in the Sperrsteliung, and
  • the Dragon Air Collar is used to drive fasteners such as nails, pins or staples.
  • the pneumatic nailer can have a magazine for the fastening means, from which in each case a fastening means is supplied to a receptacle of a necking tool of the pneumatic nailer.
  • a working piston of the pneumatic nailer is pressurized with compressed air.
  • the working piston drives a driving ram, which is connected to the working piston.
  • the drive ram strikes a rear end of the fastener in the receptacle of the muzzle tool and drives the fastener into the workpiece.
  • the Aufsetztler may be a mechanical device handein, which projects beyond the front end of the necking tool and held by a spring in this Stell ung until the pneumatic nailer is attached to a workpiece. Then the Aufsetztler is displaced against the direction of the spring force and counter to the driving direction until an orifice s tool of the pneumatic nailer abuts the workpiece or almost rests.
  • the pneumatic nailer has a main control line which is vented to trigger a Eintreibvorgangs.
  • the main control line is connected to the control valve arrangement in the open position of the safety valve arrangement.
  • the driving operation can be initiated by the main control line in different ways. For example, an embodiment with a main valve and a known. Pilot valve, which is controlled via the main control line. Details will be explained for the embodiment. Conceivable, however, are other constructions with or without pilot valve. For the invention it is only important that the driving can be triggered by ventilation or venting the main control line.
  • the control valve assembly comprises two valves, each associated with a mechanical actuator. This is the trigger valve, which is actuated by the hand-operated trigger and the Aufsetznch- ierventil, which is actuated by the embarksetzthler, so when attaching the Druckmaschineibvorgangs to a workpiece, or can be operated.
  • a special feature of the invention is the safety valve arrangement.
  • This is a pressure-controlled Ventilanordnimg with two control chambers.
  • the pressures in the two control chambers act on the safety valve arrangement or on at least one displaceable actuator of the safety valve arrangement, so that by controlling these pressures the safety valve arrangement can be displaced between a blocking position and an open position.
  • the safety management system performs two important functions. On the one hand, it controls whether the main control line is connected to the control valve arrangement. Only if this is the case, a drive-in can be triggered mitteis the control valve assembly. Thus, the safety valve arrangement prevents the triggering of a driving operation, if it is in the locked position.
  • the position of the safety valve arrangement determines whether or not there is a connection between the touch sensor valve and the second control chamber. In the open position, this connection exists, so that an actuation of the Aufsetzpathlerventils can affect the pressure in the second control room. On the other hand, if the safety valve arrangement is in the locked position, said connection does not exist and actuation of the touch-down sensor valve has no significant influence on the pressure in the second control chamber.
  • the first control chamber is connected to the trigger valve such that actuation of the trigger valve seeks to bring the safety valve assembly into the locked position.
  • actuation of the trigger valve seeks to bring the safety valve assembly into the locked position.
  • a force is exerted on a displaceable element of the safety valve assembly in the direction towards the blocking position. This can, depending on the design, be effected by a ventilation of the first control chamber, but also for example by a venting of the first control chamber.
  • the connection between the trigger valve and the first control chamber may be independent of the position of the safety valve arrangement.
  • a driving-in process can be triggered only by actuating the landing sensor and the trigger in a specific sequence. If the trigger is first actuated, the connection of the trigger valve to the first control chamber effects a displacement of the safety valve arrangement into the blocking position. A subsequent actuation of the touchdown sensor and the associated Aufsetzageler- ventiis can then no longer act on the second control chamber, so that the safety valve assembly remains in the Sperrsteiiung and no driving operation is triggered.
  • the pressure in the second control chamber can be influenced such that the safety valve arrangement remains in its open position when subsequently the trigger and thus the trigger valve is actuated.
  • the two control chambers of the safety valve arrangement are to be designed so that the force exerted by the pressures in the two control chambers on the safety valve assembly forces, possibly including other, acting on the safety valve assembly forces hold the safety valve assembly in the open position or shift it to the open position.
  • the pneumatic nailer is in a ground state, for example after the pneumatic nailer has been put into operation (eg by connecting the compressed air nailer to a compressed air source) or after a break in work, it is fundamentally not possible to trigger a driving operation by first releasing the trigger and then, at actuated trigger, the touch sensor is actuated.
  • the described influence of the pressure in the second control chamber by the actuation of the Aufsetzpathlerventils occurs in any case when the trigger is actuated.
  • the control valve arrangement can also be designed such that the action of the touch-down sensor valve on the second control chamber, regardless of the condition of the trigger valve, occurs. However, this is not necessary for the described function.
  • the action of the Aufsetzagelerventils on the second control chamber may consist of a ventilation of the second control chamber, but depending on the design of the safety valve assembly is also for example a venting of the second control chamber upon actuation of the Aufsetzagelerventils into consideration.
  • the safety valve assembly comprises a single actuator which is displaceable between the blocking position and the open division, wherein a pressure in the first control chamber, a first force on the actuator and a pressure in the second control chamber, a second, the first force opposite force on the job.
  • the safety valve arrangement is responsible for the manufacture or separation of two connections, namely, on the one hand, between the main control line and the triggering valve and, on the other hand, between the placing-on valve and the second control space. These functions can basically be exercised with the help of separate actuators.
  • the use of a single actuator is In contrast, especially easy.
  • the two control chambers can be arranged on opposite sides of the actuator, so that the forces exerted by the respective pressures on the actuator forces are automatically directed opposite. The effects of the two forces can be measured by suitable choice of the surfaces of the actuator to which the pressures act, in particular so that with simultaneous action of both forces, the actuator remains in the open position.
  • the pneumatic nailer on a spring which exerts a force on the actuator in the direction of the open position. It can thereby be achieved that the actuator is in the initial state of the pneumatic nailer in a defined position, namely in the open position.
  • each actuation of the trigger valve causes venting of the first control chamber.
  • an input of the release valve can be connected to a housing interior having compressed air, and an outlet of the release valve can be in constant communication with the first control chamber via a line.
  • the safety valve arrangement generally reaches the blocking position each time the trigger is actuated, provided that the pressure in the second control chamber does not lead to sufficiently large, oppositely directed forces.
  • the trigger valve is actuated upon each actuation of the trigger, regardless of a position of the landing probe.
  • the trigger thus acts directly on the trigger valve, in particular by a contact surface of the trigger acts on a valve pin of the trigger valve.
  • the landing feeler valve is actuated upon each actuation of the landing feeler, regardless of a position of the trigger.
  • the Aufsetztler immediately au the Aufsetzmlerventil, for example, with an actuating surface of the Aufsetzmlers acting on a valve pin of the touch sensor valve.
  • the embarksetzmler immediately au the Aufsetzmlerventil, for example, with an actuating surface of the Aufsetzmlers acting on a valve pin of the touch sensor valve.
  • the main control line is connected in the open position to an output of the Aufsetzfeedlerventils and an input of the Aufsetzmeler- ventiis is connected to an output of the trigger valve.
  • Trigger valve and Advicesetz transferlerventii are thus connected in series, so that both valves must be operated to influence the pressure in the main control line.
  • a ventilation of the main control line which is intended to connect an input of the trigger valve with a housing interior leading to compressed air.
  • the compressed air is directed from this housing interior via the trigger valve and the Aufsetzganlerventii in the main control line, if the two valves are actuated simultaneously.
  • a driving operation can basically only be triggered if the two valves are actuated simultaneously.
  • a check valve is arranged in a line which connects the Aufsetzagelerventii with the second control chamber in the open position.
  • the check valve may be oriented so that with the aid of the Aufsetzpathlerventils only ventilation or only a vent of the second control chamber is possible. In both cases, the check valve may cause the prevailing in the second control chamber pressure is maintained regardless of the position of the Aufsetzmatlerventils.
  • the second control chamber is vented via a throttle and connected to a storage chamber.
  • the volume of the storage chamber and the opening The cross-section of the throttle can be selected so that the pressure ratios established with the aid of the actuator sensor valve in the second control chamber are maintained for a period of, for example, 0.5 second to 10 seconds until the safety valve arrangement is in the open position remains. Within this period, a contact resolution is possible.
  • the safety valve arrangement vents the second control chamber in the blocking position.
  • the pressure in the second control chamber can be reset each time the safety valve arrangement responds, that is to say whenever the safety valve arrangement reaches the blocking division.
  • the safety valve arrangement reliably remains in the blocking position, at least as long as the pressure conditions in the first control chamber do not change.
  • the safety valve assembly vented in the blocking position, the main control line. This safety measure counteracts the unintentional triggering of a drive-in process.
  • the safety valve arrangement as an actuator on a locking sleeve, within which the Aufsetztlerventil is arranged.
  • the Aufsetzplerventil a fixedly arranged valve sleeve and guided therein, a displaceable valve pin, wherein the locking sleeve surrounds the valve sleeve and cooperates with this. This measure also favors a compact design.
  • the check valve is formed by an O-ring which is inserted into a circumferential groove of the valve sleeve.
  • Such a check valve can be used in a confined space between the locking sleeve and valve sleeve.
  • Grandsharmlich the storage chamber, which is connected to the second control chamber m be a single storage chamber, that is formed by a single, contiguous volume.
  • the storage chamber comprises a first storage chamber and a second storage chamber, which are connected to one another via a further throttle. It is therefore divided into two sub-volumes, between which an air exchange takes place only via the additional throttle.
  • slow venting of the storage chamber via the throttle can be achieved in that the throttle is arranged in a line which connects the second storage chamber and / or the first storage chamber with outside air.
  • the volumes of the two storage chambers can be the same size or different sizes.
  • the second storage chamber may be larger than the first storage chamber, for example by a factor of at least 2, at least 5 or at least 10.
  • the opening cross sections of the two throttles may be the same size or different sizes, in particular, the further throttle may have a larger opening cross section than the throttle.
  • the pressure required in the second control space for the described function can be quickly established via the inflow from the control valve arrangement. This ensures that the safety valve arrangement remains in the open position even if, in particular, the setting sensor is actuated only very briefly.
  • a return chamber of the pneumatic nailer is connected via a further check valve to the second storage chamber, wherein the second control chamber is connected to the first storage chamber.
  • the return chamber may annularly surround a cylinder of the pneumatic nailer and / or be vented from the working volume at each cycle of operation via a check valve.
  • the stored in this way in the return chamber compressed air is Nahe completion of a driving operation used to move the working piston back to its original position.
  • the compressed air from the return chamber is used in addition to the ventilation of the second storage chamber.
  • a throttle is a small bore with a diameter in the range of, for example, 0.1 mm to 1 mm.
  • the pneumatic nailer has a storage chamber ventilation valve, which is actuated by the control valve arrangement and designed to ventilate the second storage chamber, wherein the second control chamber is connected to the first storage chamber.
  • the storage chamber ventilation valve can establish a connection between an always ventilated housing interior and the second storage chamber.
  • the storage chamber vent valve may have its own actuator which is movable independently of other moving parts of the Drack Kunststoffnaglers. However, it may also be another actuator, such as an actuator of the pilot valve or other valve of Drackluftnaglers, for opening and closing a connection through which the second storage chamber is vented used.
  • the control of the storage chamber venting valve via the control valve assembly so that the storage chamber venting valve actuated at a common actuation of trigger and Aufsetzfactler and the second storage chamber is vented.
  • This activation of the storage chamber ventilation valve can be effected in particular via the main control unit.
  • an actuator of the memory merbel whilungsventils be displaced by the pressure prevailing in the main control line pressure in an open position, while being held in a closed position or displaced back into this in a closed position at a pressure-less main control line by a pressure in an always ventilated housing interior.
  • the ventilation of the second storage chamber also succeeds in a short time, similar to the previously described ventilation from the return chamber.
  • Fig. 2 is an enlarged view of a detail with main valve
  • FIG. 3 is a pneumatic circuit diagram of the control andparticularlyventilan- order of Druck Kunststoffnaglers of Fig. 1,
  • FIGS. 4 to 9 enlarged views of the control and safety valve arrangement of the pneumatic nailer from FIG. 1 in different operating states
  • Fig. 11 shows a detail of a sectional view of the other
  • Fig. 12 shows a detail of a sectional view of yet another pneumatic nailer.
  • FIG. 13 the Druckiuftnagier of FIG. 12 in another operating condition.
  • the Druckiuftnagier 10 has a lower Housing part 140 with a handle 12.
  • the lower housing part 140 is closed at the top by a housing cap 142.
  • a control valve assembly is arranged with a trigger valve 22 which is associated with a trigger 14, and a Aufsetz transferlerventil 18 which is associated with a Aufsetz speedler 24.
  • the embarksetz disturbler 24 is about the mouth 26 of a mouth s tool 28 by a few millimeters down over. If the pneumatic nailer 10 is attached to a workpiece, the placement sensor 24 moves upward against the force of a spring, not shown, until it is flush or almost flush with the mouth 26.
  • a slider 30, which is connected to a continuation of the Aufsetzputlers 24 or with the Aufsetz disturbler 24, always moves together with the Aufsetzmatler 24. In particular, he follows its movement relative to the housing upwards when the Druck Kunststoffnagler 10 is attached to a workpiece until he presses the Aufsetzryierventii 18.
  • the mouth tool 28 has a receptacle 46, to which a fastening means is supplied from a magazine 48 in each case. From this position within the receptacle 46, the fastener - for example, a nail, a pin or a clip - by a driving ram 50, which is connected to a working piston 52 of the pneumatic nailer 10, driven. For this purpose, the working piston 52 is guided in a working cylinder 54. Above the working cylinder 54 and this sealingly closing a main valve 56 is arranged, to the right thereof a pilot valve 58 which controls the main valve 56. Details of these elements and the associated function will be explained with reference to the enlarged detail of Figure 2.
  • FIG. 2 individual elements of the pneumatic nailer 10, which are arranged above the housing cap 142 in FIG. 1, have been omitted.
  • the pilot valve 58 is clearly visible. It has a control piston 94, which is guided in a guide sleeve 96. The lower end of the control piston 94 is connected to a lower O-ring 100 sealed against the guide sleeve 96.
  • a main control line 82 which is connected to a working volume of the pilot valve 58, vented and the Steuerkoiben 94 is in the lower position shown. In this position, it is held by the force of a spring 102.
  • the control piston 94 has a middle () ring 104 and an upper O-ring 106 in addition to the lower O-ring 100.
  • the upper O-ring 106 seals the control piston 94 from the guide sleeve 96 and closes a connection to a vent opening 108 which is connected to outside air.
  • the middle O-ring 104 is not in seal, so that a control line 110 is connected via a radial bore 112 in the guide sleeve 96 and the annular gap 70 between the control piston 94 and guide sleeve 96 on the middle O-ring 104 past the housing interior 64.
  • the control line 110 is connected via a not visible in the sectional plane shown connection with the space 72, which opens into the radial bore 112.
  • the housing interior 64 is vented in the initial state of the Druck Kunststoffnaglers 10, d. H. connected to a not shown pressure air inlet and standing under operating pressure.
  • the control line 110 is connected to a space 114 above a main valve actuator 116 of the main valve 56, so that the main valve actuator 116 is applied with a downward force and the upper edge of the working cylinder 54 by means of an O-ring 118 relative to the housing interior 64 seals.
  • the main valve actuator 116 is acted upon by a spring 120 with a force in the direction of the shown, the working cylinder 54 occluding position.
  • a drive-in operation is triggered by venting the main control line 82 by the control piston 94 is displaced upward, so that the middle O-ring 104th enters seal and the upper O-ring 106 moves out of the seal.
  • the connection of the control line 110 to the housing interior 64 is shut off and a connection between the control line 110 and a vent opening (not shown) is established.
  • the space 114 above the Hauptventii-Stellgiieds 116 is vented through the vent and the main valve actuator 116 is displaced by the prevailing at its lower, outer annular surface 122, prevailing in the housing interior pressure 64 against the force of the spring 120 upwards.
  • compressed air flows from the housing interior 64 into the working cylinder 54 above the working piston 52 and drives the working piston 52 downwards.
  • the driving ram 50 connected to the working piston 52 drives a fastening means.
  • FIG. 1 shows at the top left the main control line 82, which leads to the pilot valve 58 in the embodiment.
  • the safety valve arrangement 16 is located in a dotted rectangle.
  • the rectangle which is also depicted dotted further to the right, sums up the fitting-on valve 18 and the trigger valve 22 to the control valve arrangement 20.
  • Triggered by the trigger 14 Auslöserventii 22 has a first input 32 which is connected to the housing interior 64.
  • a second input 34 of the trigger valve 22 is connected to Carnegieiuft.
  • the in the drawn, un actuated position of the trigger valve 22 connected to the second input 34 output 36 of the trigger valve 22 is connected via a line 38 to a first input 40 of the Aufsetz transferlerventils 18.
  • the second input 42 of the Aufsetz transferlerventils 18 is connected to outside air.
  • the output 44 of the Aufsetz transferlerventils 18 to the second input 42 of the Aufsetzputlerventils 18 is connected.
  • the safety valve assembly 1 6 has a first control chamber 60, a second control chamber 62, a first output 66 and a second output 68.
  • the safety valve assembly 16 has a first input 74, a second input 76, a third input 78 and a fourth input 80.
  • the single actuator 98 of the safety valve assembly 16 is veriagerbar of the drawn Offensteliung in a blocking position.
  • the first input 74 of the safety valve assembly 16 is connected via a line 124 to the output 44 of the Aufsetzpathlerventils 18.
  • the first output 66 of the safety valve assembly 16 is connected to the main control line 82, the second input 76 of the safety valve assembly 16 is connected to outside air.
  • the first input 74 is connected to the first output 66, so that a connection between the main control line 82 and the control valve assembly 20 is made.
  • the third input 78 of the safety valve assembly 16 is connected via a line 126, in which a check valve 128 is arranged, with the output 44 of the touch sensor valve 18.
  • the fourth input 80 of the safety valve assembly 16 is connected to outside air.
  • the second outlet 68 of the safety valve assembly 16 is connected to a storage chamber 130 and to the second control chamber 62.
  • the third input 78 is connected to the second output 68, so that a ventilation of the second control chamber 62 via the Aufsetzpathlerventil 18 is possible.
  • the first control chamber 60 is connected to the output 36 of the trigger valve 22 via a line shown in dashed lines. If, starting from the grand state of FIG. 3, the release valve 22 is first actuated, its outlet 36 is connected to the housing interior 64. As a result, the first control chamber 60 is vented, whereby the steep member 98 of the safety valve assembly 16 is displaced into the blocking position. As a result, the connection between the third input 78 and the second output 68 of the safety valve arrangement is interrupted so that a subsequent actuation of the setting sensor valve 18 can not ventilate the second control space 62. In addition, the first output 66 is disconnected from the first input 74 of the safety valve assembly 16, so that the control valve assembly 20 no longer acts on the main control line 82 and a driving operation can not be triggered.
  • the main control line 82 is vented by the connection produced in the blocking position between the first output 66 and the second input 76 of the safety valve assembly 16. If a pressure different from outside air prevails in the storage chamber 130, it is at the same time vented via the connection established by the safety valve arrangement 16 between the second outlet 68 and the fourth inlet 80.
  • the triggering of a driving operation is only possible again when the trigger valve 22 is transferred by releasing the trigger 14 in its unactuated position.
  • the first control chamber 60 is vented via the connection made between the outlet 36 and the second inlet 34 of the trigger valve 22, so that the actuator 98 returns to its open position by the force of the spring 84.
  • the touch-up sensor valve 18 In order to initiate a first drive-in process starting from the initial state, the touch-up sensor valve 18 must first be actuated. As a result, a connection between the first input 40 and the output 44 of the Aufsetz transferler- ventiis 18 is produced. Upon a subsequent actuation of the release valve 22, a connection between its first input 32 and its output is then made. gear 36, so that compressed air via the line 38 into the first control chamber 60 and simultaneously via the actuated Aufsetzpathlerventil 18, the check valve 128 and the line 126 and existing in the open position connection between the third input 78 and the second output 68 of the safety valve assembly sixteenth flows into the second control chamber 62.
  • the forces acting on the actuator 98 by the pressures in these two control chambers act on the actuator 98, which, in cooperation with the spring 84, results in the actuator 98 remaining in the illustrated open position. Therefore, the ventilation of the line 124 at the same time causes ventilation of the main control line 82 and it is triggered a driving operation.
  • the Aufsetzpil 18 returns to its drawn, unactuated position. Because of the check valve 128 while the prevailing in the storage chamber 130 and the second control chamber 62 pressure is initially maintained, so that the steeping member 98 remains in its open position. However, the pressure in the second control chamber 62 and the storage chamber 130 slowly degrades via the throttle 132, until it finally drops below a pressure weld. At this moment, the actuator 98 moves due to the permanently actuated trigger valve 22 in the first control chamber 60 applied pressure in its blocking position. From this point on a further contact release is not possible.
  • FIG. 4 shows the initial state in which touch sensor valve 18 and trigger valve 22 are each drawn in their unactuated position.
  • the safety valve assembly 16 has as adjusting member 98, a locking sleeve 144 which surrounds a valve sleeve 146 of the Aufsetzryierventils 18.
  • the pressurized housing interior 64 is shut off by the O-ring 148 from the leading to an input of Aufsetztierventils 18 line 38. Instead, the line 38 is connected via the radial bore 150 and the annular gap 152 of the Ausiöserventils 22 with outside air.
  • the main control line 82 is also connected to the outside air, via a radial bore 154 in the locking sleeve 144, which is in its open division, a radial bore 156 in the valve sleeve 146 and an annular gap 158 of the Aufsetz transferierventils 18.
  • a radial bore 156 in the valve sleeve 146 and thus also the main control line 82 from the line 38 through the gasket O-ring 160 of the Aufsetzageierventils 18 shut off.
  • the first control chamber 60 which is connected to the line 38.
  • the pressure in this first control chamber 60 acts on the locking sleeve 144 via an annular surface 162 of the locking sleeve 144 and seeks to shift it downwards into the locking position in FIG. 4.
  • the second control chamber 62 is located below the locking sleeve 144 and acts on two annular surfaces 164, 166 of the locking sleeve 144 on this.
  • the pressure in the second control chamber 62 therefore attempts the locking sleeve 144 in the drawn open position, ie in Fig. 4 upward to relocate.
  • a force in just this direction also exerts the spring 84 on the locking sleeve 144.
  • the second control chamber 62 has a relatively large volume and is therefore at the same time a storage chamber 130. About the throttle 132, the second control chamber 62 and the storage chamber 130 is connected to outside air.
  • FIG. 5 shows the arrangement from FIG. 4 after the application of the pneumatic nail 10 to a workpiece.
  • FIGS. 5 to 9. It can be seen in Fig. 5 that the slider 30 of the Aufsetzretelers 24 displaced upward and the valve pin 88 has moved upwards, whereby the Aufsetz transferlerventii 18 has been set in the actuated position. By this measure, the O-ring 160 has moved out of the seal, so that now the line 38 via the Aufsetzagelerventii 18 and its radial bore 156 and the radial bore 154 in the locking sleeve 144 to the main control line 82 is connected.
  • the O-ring 188 seals the lines 124, 126 from outside air. Since the trigger valve 22 is still in its unactuated position, the conduit 38 is vented, so that actuation of the Aufsetzpathlerventils 18 has no further effect.
  • the trigger 14 and thus the trigger valve 22 is actuated, as shown in Figure 6, the O-ring 148 moves out of the seal, so that the line 38 is vented. At the same time, the O-ring 168 seals this line 38 from outside air. The connected to the line 38 first control chamber 60 is also vented.
  • the Venti lhül se 146 has a radial bore 170 and a closing this O-ring 172.
  • the radial bore 170 and the O-ring 172 together form the check valve 128.
  • the second control chamber 62 is also vented via line 38.
  • the air flows through the check valve 128 and further through an annular gap 174 formed between the valve sleeve 146 and the locking sleeve 144.
  • This ventilation of the second control chamber 62 takes place at about the same time as the ventilation of the first control chamber 60, so that the forces exerted by these two control chambers 60, 62 on the locking sleeve 144 forces are effective at about the same time.
  • valve sleeve 146 O-ring 178 closes an annular gap between the valve sleeve 146 and locking sleeve 144, through which there was previously a connection between the radial bore 156 of the valve sleeve 146 and the radial bore 154 of the locking sleeve 144.
  • the main control line 82 is shut off from the line 38.
  • the space designated 180 in FIG. 8 is connected to outside air via a non-visible bore.
  • the locking sleeve 144 is now so long in their locked position shown in Figure 8, as the trigger 14 remains actuated.
  • FIGS. 10 and 11 Another pneumatic nailer 10 will be explained with reference to FIGS. 10 and 11.
  • Essential elements of the further pneumatic nailer 10 correspond to the pneumatic nailer 10 from FIGS. 1 to 9. These elements are provided with the same reference numerals as there and will not be explained again. These include, in particular, the control valve arrangement 20 and the safety valve arrangement 16. Differences exist with regard to the control of the pressure in the second control space 62.
  • FIG. 10 illustrates, there is now instead of a single control chamber 130, a first control chamber 130a and a second control chamber 130b, which are connected to each other via another throttle 132b.
  • the second control chamber 130b is continuously connected to outside air via a throttle 132.
  • another check valve 128a is arranged.
  • the volumes of the two control chambers 130a and 130b may be of different sizes, although not necessary.
  • the volume of the first control chamber 130a may be made smaller than the volume of the second control chamber 130b.
  • the opening cross section of the further throttle 132b may deviate from the opening cross section of the throttle 132, although this is not necessary.
  • the opening cross section of the further throttle 132b may be greater than the opening cross section of the throttle 132.
  • the further throttle 132b and / or the throttle 132 may in particular each be formed by a small bore with a diameter in the range of 0.1 mm to 1 mm.
  • the realization of the first control chamber 130a is very similar to that of the single control chamber 130 in the embodiment of FIGS. 1 to 9. Additionally shown is the return chamber 192 of the Pneumatic nailer 10, which is vented via a non-return valve formed by an O-ring 194 as soon as the working piston 52 has been driven sufficiently far down.
  • the further check valve 128a is formed by an O-ring 196, which seals a connection between the second storage chamber 130b and the return chamber 192.
  • the second storage chamber 130b has a significantly larger volume than the first storage chamber 130a. It corresponds approximately to the volume of the return chamber 192.
  • the second storage chamber 130b is arranged annularly around the working cylinder 54.
  • an obliquely arranged sleeve 198 is inserted, which forms at one end a further throttle 132b formed by a small longitudinal bore.
  • the sleeve 198 has a small transverse bore which connects the interior of the sleeve 198 with outside air. This small transverse bore forms the throttle 132.
  • FIG. 11 Another difference from the exemplary embodiment of FIGS. 1 to 9 is that, as shown in FIG. 11, the touch sensor 30 does not act directly on the valve pin 88 of the touch sensor valve 18, but via a rocker 200 mounted pivotably on the housing of the pressure nailer 10.
  • FIGS. 12 and 13 Essential elements of this Druckiuftnaglers 10 correspond to the pneumatic nailer 10 of Figures 10 and 11. These elements are provided with the same reference numerals as there and will not be explained again. These include in particular the control valve arrangement 20 and the safety valve arrangement 16 as well as the storage chamber 130 subdivided into a first storage chamber 130a and a second storage chamber 130b. Differences exist with respect to the ventilation of the second storage chamber 130b. Unlike the Drackluftnagler 10 of Figures 10 and II, the ventilation of the second storage chamber 130b does not take place via a check valve from the remindholhunt 192, but via a separate Speichercrobel structuriungsven- til 202.
  • an O-ring 206 which is disposed around the actuator 204 around, is in sealing and thereby blocks a connection between the always ventilated housing interior 64 and the second control chamber 130b.
  • a component 208 accommodating a part of the pilot control valve 58 forms part of the main control line 82 and a further control line 210, connected to the main control line 82, via which the accumulator chamber ventilation valve 202 is actuated.
  • the pressure prevailing in the further control line 210 acts on a piston of the storage chamber ventilation valve 202 formed by the actuator 204.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

L'invention concerne une cloueuse pneumatique pourvue : - d'un piston de travail qui est relié à un poussoir d'enfoncement destiné à enfoncer un moyen de fixation et qui, au déclenchement d'un processus d'enfoncement, est sollicité par de l'air comprimé, - d'un déclencheur et d'un capteur de contact, dont l'actionnement commun peut aérer ou désaérer une conduite de commande principale et peut ainsi déclencher un processus d'enfoncement, - d'un ensemble soupape de commande, qui présente une soupape de déclencheur associée au déclencheur et une soupape de capteur de contact associée au capteur de contact, et - d'un ensemble soupape de sécurité qui est déplaçable entre une position de blocage et une position d'ouverture à la suite d'une commande de la pression dans une première chambre de commande et de la pression dans une deuxième chambre de commande, - la conduite de commande principale étant reliée à l'ensemble soupape de commande dans la position d'ouverture et n'étant pas reliée à l'ensemble soupape de commande dans la position de blocage, - la première chambre de commande est reliée à la soupape de déclencheur de telle sorte qu'un actionnement de la soupape de déclencheur cherche à amener l'ensemble soupape de sécurité dans la position de blocage, et - dans la position d'ouverture, la deuxième chambre de commande est reliée à la soupape de capteur de contact de telle sorte qu'un actionnement de la soupape de commande cherche à amener l'ensemble soupape de sécurité dans la position d'ouverture dans tous les cas lorsque la soupape de déclencheur est actionnée.
PCT/EP2018/071970 2017-08-23 2018-08-14 Cloueuse pneumatique à ensemble soupape de sécurité Ceased WO2019038124A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BR112020002035-4A BR112020002035A2 (pt) 2017-08-23 2018-08-14 pregador de ar comprimido com disposição de válvula de segurança
US16/640,632 US11628549B2 (en) 2017-08-23 2018-08-14 Compressed air nailer with safety valve assembly
JP2020508045A JP7049049B2 (ja) 2017-08-23 2018-08-14 安全弁装置を備えた圧縮空気釘打機
AU2018319253A AU2018319253B2 (en) 2017-08-23 2018-08-14 Pneumatic nail gun having a safety valve assembly
RU2020110228A RU2781550C2 (ru) 2017-08-23 2018-08-14 Пневматический гвоздезабивной пистолет с предохранительным клапанным блоком
CN201880053950.7A CN111372730B (zh) 2017-08-23 2018-08-14 具有安全阀组件的气动钉枪

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17187512.3A EP3446833B1 (fr) 2017-08-23 2017-08-23 Cloueur à air comprimé pourvu de dispositif de soupape de sécurité
EP17187512.3 2017-08-23

Publications (1)

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WO2019038124A1 true WO2019038124A1 (fr) 2019-02-28

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EP (1) EP3446833B1 (fr)
JP (1) JP7049049B2 (fr)
CN (1) CN111372730B (fr)
AU (1) AU2018319253B2 (fr)
BR (1) BR112020002035A2 (fr)
ES (1) ES2788184T3 (fr)
PL (1) PL3446833T3 (fr)
TW (1) TWI702122B (fr)
WO (1) WO2019038124A1 (fr)

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EP3760379A1 (fr) 2019-07-02 2021-01-06 Joh. Friedrich Behrens AG Cloueur pneumatique doté d'un dispositif de sécurité
TWI734417B (zh) * 2020-03-18 2021-07-21 力肯實業股份有限公司 氣動釘槍的氣路結構
TWI734418B (zh) * 2020-03-18 2021-07-21 力肯實業股份有限公司 氣動釘槍的氣路結構
TWI771006B (zh) * 2021-05-18 2022-07-11 力肯實業股份有限公司 氣動釘槍的氣路結構
US11491623B2 (en) 2019-10-02 2022-11-08 Illinois Tool Works Inc. Fastener driving tool
RU2785512C1 (ru) * 2019-07-02 2022-12-08 Беа Гмбх Пневматический гвоздезабивной пистолет с предохранительным устройством

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EP3479963B1 (fr) * 2017-11-01 2020-12-09 Joh. Friedrich Behrens AG Cloueur à air comprimé pourvu d'un système de soupape de sécurité
JP7222305B2 (ja) * 2019-04-26 2023-02-15 マックス株式会社 空気圧工具
US11583986B2 (en) * 2020-03-18 2023-02-21 De Poan Pneumatic Corp. Air-path structure of pneumatic nail gun
CN113305782A (zh) * 2021-05-27 2021-08-27 王富玲 一种路障定位钉拔出装置

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EP2767365B1 (fr) 2013-02-19 2016-12-28 Joh. Friedrich Behrens AG Cloueur à air comprimé avec déclencheur manuel et capteur de contact
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3760379A1 (fr) 2019-07-02 2021-01-06 Joh. Friedrich Behrens AG Cloueur pneumatique doté d'un dispositif de sécurité
WO2021001477A1 (fr) 2019-07-02 2021-01-07 Joh. Friedrich Behrens Ag Cloueuse pneumatique pourvue d'un dispositif de sécurité
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RU2785512C1 (ru) * 2019-07-02 2022-12-08 Беа Гмбх Пневматический гвоздезабивной пистолет с предохранительным устройством
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TWI734417B (zh) * 2020-03-18 2021-07-21 力肯實業股份有限公司 氣動釘槍的氣路結構
TWI734418B (zh) * 2020-03-18 2021-07-21 力肯實業股份有限公司 氣動釘槍的氣路結構
TWI771006B (zh) * 2021-05-18 2022-07-11 力肯實業股份有限公司 氣動釘槍的氣路結構

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AU2018319253B2 (en) 2023-02-23
JP7049049B2 (ja) 2022-04-06
PL3446833T3 (pl) 2020-10-19
AU2018319253A1 (en) 2020-02-13
US11628549B2 (en) 2023-04-18
ES2788184T3 (es) 2020-10-20
TWI702122B (zh) 2020-08-21
CN111372730A (zh) 2020-07-03
EP3446833B1 (fr) 2020-04-15
RU2020110228A3 (fr) 2021-12-16
TW201919826A (zh) 2019-06-01
BR112020002035A2 (pt) 2020-09-08
RU2020110228A (ru) 2021-09-24
US20210138621A1 (en) 2021-05-13
EP3446833A1 (fr) 2019-02-27
CN111372730B (zh) 2023-11-21
JP2021501059A (ja) 2021-01-14

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